CN103901959B - Mainboard and power management method thereof - Google Patents
Mainboard and power management method thereof Download PDFInfo
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- CN103901959B CN103901959B CN201310072532.1A CN201310072532A CN103901959B CN 103901959 B CN103901959 B CN 103901959B CN 201310072532 A CN201310072532 A CN 201310072532A CN 103901959 B CN103901959 B CN 103901959B
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Abstract
The invention discloses a mainboard which is applied to various power supplies with different load driving capacities. The power supply provides a supply voltage source to the motherboard. The mainboard includes: a comparator; the reference voltage generating circuit outputs reference voltage coupled to one input end of the comparator; a power load having a power output terminal coupled to the supply voltage source and a control terminal coupled to an output terminal of the comparator; an interface voltage; a potential determining resistor coupled to the interface voltage; the expansion card slot is used for the electric insertion of the expansion card and is provided with a state pin coupled with the potential determining resistor and the other input end of the comparator. When the expansion card is inserted into the expansion card slot, the power load is closed; otherwise, the power load is turned on to increase the output load of the supply voltage source.
Description
【Technical field】
The present invention is related to a kind of circuit board and its method for managing power supply, particularly a kind of motherboard and its power management side
Method.
【Background technology】
At least need to set central processing unit in the computer of early stage, on motherboard（central processing
Unit, CPU）, display card（graphics card）, internal memory（memory module）Ability normal boot-strap, subsequently into operation
System（Operating system, OS）Normal operation.With the progress of integrated circuit manufacture process ability, more and more function quilts
It is integrated among same chips, such as has considerable low order to show that card function is integrated into the chipset of motherboard at present
（chipset）In, or even further integrated with central processing unit.In addition, motherboard now also seldom needs to plug additionally
Sound card to provide sound effect function, hence in so that needing the spare part number that plugs in addition less and less on motherboard.
Moreover, integrated circuit manufacture process ability has had come to nm（Nanometer, 10 minus 9 meters）The skill of grade
Art level, except more and more functions can be integrated on same chips as described above, and can be lifted circuit operation frequency it
Outside, the power consumption needed for chip is also less and less so that the motherboard circuits mainly run with a large amount of integrated circuits, its entirety are
Power consumption of uniting is also less and less with writing, or even under the application situation of some low power consumptions running, its overall power is less than 5 watts
（Watt）.
Also therefore, the power supply unit in computer installation（Power supply unit, PSU）In current application feelings
Under border, it has not been problem that maximum, which can supply power,.But commercially available some power supply units, its supply-voltage source is generally just
12 volts of power supplys, when output loading kicks the beam as output current is less than 0.8 ampere-hour, the adjustment of its voltage（regulation）Function
It can start exception be in the presence of, or even start its low current protection（under current protection）Mechanism, and from
It is dynamic to cut off the output of its power supply.Such as when computer installation starts boot-strap program code, system overall power is in start process
Suitable small of specific period, such as the part of central processing unit are had, its power consumption is less than 6 watts, now if computer installation
Collocation be above-mentioned power supply unit, its will automatically cut off power supply output, cause computer installation can not normal boot-strap,
It cannot propagate into operating system.
Due to voluntarily buying all parts needed for computer installation at present, and voluntarily assemble making for overall calculation machine system
User is found almost everywhere, therefore is not avoided that it chooses above-mentioned power supply unit, and then meets with described problem.Solve to ask at present
The mode of topic, mainly there are following two kinds：First, power supply unit encloses a fictitious load with its product（dummy load）, it is false
Load is a powerful cement resistor, and by the female seat of Winchester disk drive attaching plug, is connected to the supply of power supply unit
On voltage source, such as positive 12 volts of voltage sources so that the output loading of supply-voltage source persistently maintains can normal work
On the setting value of work.But this method causes power supply unit to have unnecessary output loading always, may lead to not pass through
For 80 PLUS international norms of power supply unit.Second, manufacturer plugs the fictitious load of one group of fixation on motherboard, its
Purpose is identical with first method, but computer installation may be caused can not to pass through Energy Star（Energy Star）Rule
Model.
【The content of the invention】
In view of the above problems, the present invention provides a kind of motherboard and its method for managing power supply, motherboard is applied to not
Same power supply unit, and can maintain the efficiency optimization of system power.
In order to solve the above problems, the present invention proposes a kind of motherboard, applied to different power supply units.Power supply is supplied
Device provides supply-voltage source and gives motherboard.Motherboard includes power control circuit and expansion card slot.Power control circuit bag
Include comparator, generating circuit from reference voltage, power termination, interface voltage and current potential and determine resistance.Comparator has the first ratio
Compare input compared with input, second and compare output end.Generating circuit from reference voltage is coupled to second and compares input,
And export a reference voltage.Power termination has control terminal and power take-off, and wherein power take-off is coupled to supply
Voltage source, control terminal, which is coupled to, compares output end.Current potential determines that resistance is coupled to interface voltage.Expansion card slot is for expansion board electricity
Property plug, and with status pin be coupled to current potential determine resistance input compared with first.Wherein, status pin normally coupling
Together in interface voltage, make the voltage of status pin between interface voltage and reference voltage, or equal to interface voltage.Compare
Device exports the first output voltage to power termination, to open power termination, and has additional supply of the output loading of voltage source.And work as
Expansion board is inserted in expansion card slot, expansion board determine the voltage of status pin not between interface voltage and reference voltage it
Between, also not equal to interface voltage, comparator exports the second output voltage to power termination, to close power termination.
The present invention proposes a kind of motherboard again, is driven applied in computer system, and suitable for various tool different loads
The power supply unit of kinetic force.Power supply unit provides supply-voltage source and gives motherboard.Motherboard includes control assembly and work(
Rate loads.There is control assembly open state to export stitch.Power termination has control terminal and power take-off.Power output
End is coupled to supply-voltage source, and control terminal is coupled to open state output stitch.Wherein, when computer system performs boot program
Code simultaneously transmits start signal to control assembly, and the open state output stitch of control assembly is defeated according to start signal output first
Go out voltage to power termination, to open power termination, and have additional supply of the output loading of voltage source.And when computer system is complete
Into boot-strap program code, the open state output stitch of control assembly exports the second output voltage to power termination, to close work(
Rate loads.
The present invention more proposes a kind of method for managing power supply of motherboard, comprises the following steps：
Power termination of the supply-voltage source to motherboard is provided with power supply unit.The generating circuit from reference voltage of motherboard
Output reference voltage.Whether the expansion card slot for judging motherboard with a comparator of motherboard plugs expansion board, if it is not, expanding
The voltage of one status pin of card slot is defeated between interface voltage and reference voltage, or equal to interface voltage, comparator
Go out the first output voltage to power termination, to open power termination, and have additional supply of the output loading of voltage source；If so, expand
Card determines the voltage of status pin not between interface voltage and reference voltage, also defeated not equal to interface voltage, comparator
Go out the second output voltage to power termination, to close power termination.
The present invention proposes a kind of mainboard power supply management method in addition, applied to computer system.Method for managing power supply bag
Include following steps：
Power termination of the supply-voltage source to motherboard is provided with power supply unit.Start computer system and perform start journey
Sequence code, and start signal is transmitted to the control assembly of motherboard.The open state output stitch of control assembly is interrogated according to start
Number output the first output voltage to power termination, to open power termination, and have additional supply of the output loading of voltage source.Work as calculating
Machine system completes boot-strap program code, and the open state output stitch of control assembly exports the second output voltage to power termination,
To close power termination.
The effect of of the invention, is, by the control circuit and its method for managing power supply on motherboard, in supply-voltage source
Output loading when may be too low, there is provided its extra output loading, and in the case where not needing the behaviour in service of extra output loading
Be turned off, thus make supply-voltage source under various states can normal work, and make to include the motherboard of the present invention
Different electrical power supply can be applicable, while and can takes into account the efficiency optimization of system power.
Feature, implementation and effect for the present invention, schema is hereby coordinated to make most preferred embodiment detailed description as follows.
【Brief description of the drawings】
The present invention is further detailed explanation with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the block schematic diagram of the motherboard of first embodiment of the invention.
Fig. 2 is the power management process figure of the motherboard of first embodiment of the invention.
Fig. 3 is the circuit diagram of the generating circuit from reference voltage of the motherboard of first embodiment of the invention.
Fig. 4 is the circuit diagram of the power termination of the motherboard of first embodiment of the invention.
Fig. 5 is the block schematic diagram of the motherboard of second embodiment of the invention.
Fig. 6 is the power management process figure of the motherboard of second embodiment of the invention.
Fig. 7 is the block schematic diagram of the motherboard of third embodiment of the invention.
Fig. 8 is the method for managing power supply flow chart of the motherboard of third embodiment of the invention.
Fig. 9 is the block schematic diagram of the motherboard of fourth embodiment of the invention.
Figure 10 is the method for managing power supply flow chart of the motherboard of fourth embodiment of the invention.
Figure 11 is the circuit diagram of the voltage quasi position change-over circuit of the motherboard of fourth embodiment of the invention.
Primary clustering symbol description：
100th, the comparator of 200,400,500 motherboard 110
111 first, which compare input 112 second, compares input
113 compare the generating circuit from reference voltage of output end 120
The power termination of 121 reference voltage 130
The power take-off of 131 control terminal 132
The status pin of 140 expansion card slot 141
150 current potentials determine the supply-voltage source of resistance 160
The control circuit enable of 170 interface voltage 180 switchs
185 except the energy enable control terminal of voltage 190
The reference resistance of 195 power control circuit 210 first
The earth terminal of 220 second reference resistance 230
The switch module of 310 power resistor 320
The open state of 410 control assembly 411 exports stitch
The input of 510 voltage quasi position change-over circuit 511
The level transfer resistance of 512 output end 610
620 level change-over switches
【Embodiment】
Among specification and following claims, one word of coupling includes any directly and indirect electric herein
Connection means.Therefore, if the first device of described in the text one is coupled to a second device, representing first device directly can electrically connect
Second device is connected to, or is electrically connected indirectly to second device through other devices or connection means.In addition, positive signal is
The state of one Digital Logic signal, or can be regarded as in general Digital Logic signal state is 1, and anti-phase signal is another numeral
The state of logic signal, or in general Digital Logic signal state is can be regarded as 0.
Fig. 1 is the block schematic diagram of the motherboard 100 disclosed by first embodiment of the invention.Motherboard 100 is applied to one
Among computer installation, and suitable for the power supply unit of different loads driving force（Do not show in figure）, and this power supply is supplied
Device provides supply-voltage source 160 to motherboard 100, such as provides positive 12 volts of voltage source output, for motherboard 100 and
Power supply of the component thereon as needed for Winchester disk drive, expansion board is plugged to use.Motherboard 100 includes a power control circuit
195 and an expansion card slot 140, power control circuit 195 include comparator 110, generating circuit from reference voltage 120, power
Load 130, current potential determine resistance 150 and interface voltage 170.
As shown in figure 1, comparator 110 has first compare input 111, second compare input 112 and more defeated
Go out end 113.Wherein when the first voltage for comparing input 111 is less than the second voltage for comparing input 112, comparator 110 is defeated
Go out the first output voltage；And when the first voltage for comparing input 111 is more than the second voltage for comparing input 112, comparator
110 the second output voltages of output.
What generating circuit from reference voltage 120 was coupled to comparator 110 second compares input 112, to export with reference to electricity
Pressure 121, using the Voltage Reference level being compared as comparator in the present embodiment 110.
Power termination 130 has control terminal 131 and power take-off 132, and wherein power take-off 132 is coupled to supply
Voltage source 160, control terminal 131 are coupled to the comparison output end 113 of comparator 110, and comparator 110 controls through control terminal 131
The open and close of power termination 130.In addition, in the present invention, power termination 130 can be but not limited to more than watt level big
Power termination.
Current potential determines that one end of resistance 150 is coupled to interface voltage 170, and the other end is coupled to expansion card slot 140.Such as figure
Shown in 1, expansion card slot 140 plugs for an expansion board, such as provides the expansion boards such as display card or internal memory and electrically plug wherein.Expand
Filling card slot 140 has a status pin 141, and it is coupled to the first of comparator 110 and compares input 111, and current potential determines
Resistance 150 is coupled to the status pin 141 of expansion card slot 140.In addition, expansion card slot 140 can be display drawing array
（Video graphic array, VGA）The expansion card slot of card is shown, or supports peripheral interconnection standard
（Peripheral component interconnect express, PCI-E）Expansion card slot, but be not limited.
Fig. 2 is the power management process figure of the motherboard of first embodiment of the invention, coordinates the motherboard shown in Fig. 1 herein
The operation that 100 block schematic diagram describes its control circuit is as follows：As shown in step 250, supply electricity is provided with power supply unit
Potential source to motherboard power termination.As shown in step 260, comparator judges whether the expansion card slot of motherboard plugs expansion
Card, if it is not, then as shown in step 270, the voltage of the status pin of expansion card slot between interface voltage and reference voltage it
Between, the voltage of wherein status pin is different from reference voltage, and levels off to or equal to interface voltage, now comparator output the
One output voltage to open power termination, and has additional supply of the output loading of voltage source to power termination；If so, then such as step
Shown in 280, the voltage of expansion board setting status pin is not between interface voltage and reference voltage, that is, is not equal to and connects
Mouth voltage, the second output voltage of now comparator output is to power termination, to close power termination.
For example, if interface voltage 170 is more than reference voltage 121, when expansion board is not inserted in expansion card slot 140
When, status pin 141 determines that resistance 150 is coupled to interface voltage 170 via current potential, and big in the generation one of status pin 141
In the magnitude of voltage of reference voltage 121, now comparator 110 exports control of first output voltage to power termination 130 after relatively
End 131 processed, to open power termination 130, that is, provide an extra output loading and give supply-voltage source 160.Conversely, when expansion
When filling card insertion and being located at expansion card slot 140, expansion board will set the voltage of status pin 141, and produce one in status pin 141
Less than the voltage of reference voltage 121, now comparator 110 exports control of second output voltage to power termination 130 after relatively
End 131 processed, to close power termination 130, that is, the extra output loading of supply-voltage source 160 will not be caused.
Illustrate as a further example again, be set smaller than in other embodiments of the invention or by interface voltage 170
The state of reference voltage 121, therefore when expansion board is not inserted in expansion card slot 140, status pin 141 determines via current potential
Resistance 150 is coupled to interface voltage 170, and produces the voltage for being less than reference voltage 121 in status pin 141, now compares
Device 110 exports the first output voltage to the control terminal 131 of power termination 130 after relatively, to open power termination 130, that is,
Provide an extra output loading and give supply-voltage source 160；Conversely, when expansion board is inserted in expansion card slot 140, expand
Card will set the voltage of status pin 141, status pin 141 is produced the voltage for being more than reference voltage 121, now comparator
110 export the second output voltage to the control terminal 131 of power termination 130 after relatively, to close power termination 130, that is, not
The extra output loading of supply-voltage source 160 can be caused.
The effect of the present embodiment, is, when expansion board is not inserted in motherboard 100, prevents the defeated of supply-voltage source 160
Go out load too low, and cause power supply unit irregular working, or even the action that starting protection mechanism is closed automatically, and then
Computer installation can not be occurred the problem of normal use.Also, when expansion board is inserted in motherboard 100, power supply electricity
Road 195 can't form unnecessary output loading on supply-voltage source 160, therefore power supply unit can play optimal power supply and carry
For efficiency.
Therefore, the state for motherboard 100 whether being inserted according to expansion board is born to decide whether to provide an extra output
Load gives supply-voltage source 160, not only make the supply-voltage source 160 of power supply unit under various states can normal work,
Also equalization point is obtained in the optimization of the system power of computer installation, makes the institute of supply-voltage source 160 of power supply unit defeated
The load gone out all belongs to autotelic output, rather than invalid waste.
In addition, as shown in figure 3, in the present invention, generating circuit from reference voltage 120 may include there is the first reference resistance 210
And second reference resistance 220.First reference resistance 210 is coupled between interface voltage 170 and reference voltage 121, the second ginseng
Resistance 220 is examined to be coupled between reference voltage 121 and earth terminal 230.As it was previously stated, the system of reference voltage 121 is as comparator 110
The Voltage Reference level being compared.For example, when expansion board is inserted in expansion card slot 140, the voltage system of status pin 141
Set via the interlock circuit on expansion board, such as status pin 141 is connected into earth terminal 230 to make both voltage phases
Deng；And when expansion board is not inserted in expansion card slot 140, the voltage system of status pin 141 determines resistance 150 via current potential
Coupling and formed, such as the voltage of status pin 141 is equal to interface voltage 170.Further, since the system of reference voltage 121 by
Interface voltage 170 is formed with the first reference resistance 210 and the partial pressure of the second reference resistance 220, therefore can be via comparator 110
Comparative result and that learns expansion board plug state.
Further, since the system of reference voltage 121 is determined by the partial pressure of the first and second reference resistance 210,220, therefore
It is contemplated that in the case of different circuit operations, arround noise size difference, such as plugged expansion board relative to not plugging
The situation of expansion board, to carry out optimized design.Such as when expansion board is inserted in the expansion card slot 140 of motherboard 100,
May cause power control circuit 195 it is larger arround noise, and now the voltage of status pin 141 be earth terminal 230 electricity
Pressure, therefore reference voltage 121 can be designed as to the half more than interface voltage 170, to cause the input difference of comparator 110
It is larger, that is, there is preferable rejection ability for noise, to ensure that comparator can obtain preferable comparative result.
Fig. 4 is the circuit diagram of the power termination 130 of the motherboard 100 disclosed by first embodiment of the invention.At this
In embodiment, power termination 130 may include there is power resistor 310 and switch module 320.Power resistor 310 and switch module
320 Tandem connects, and is coupled between power take-off 132 and earth terminal 230.The control terminal of switch module 320
It is then the control terminal 131 of power termination 130.Turned on, power resistor 310 when switch module 320 receives the first output voltage
An output loading is formed between supply-voltage source 160 and earth terminal 230, such as supply-voltage source 160 is positive 12 volts, and
Power resistor 310 is 24 nurses difficult to understand, then the electric current when switch module 320 turns on thereon is 0.5 ampere.It should be noted that this
When power resistor 310 will consume 6 watts of power, it is therefore desirable to consider its power consumption, and to be resistant to high power consumption
Resistance realize power resistor 310, such as cement resistor.
Fig. 5 is the block schematic diagram of the motherboard 200 of second embodiment of the invention.The motherboard 200 of the present embodiment and
The difference between motherboard 100 disclosed by one embodiment is that the motherboard 200 disclosed by second embodiment of the invention enters one
Step includes control circuit enable switch 180, except energy voltage 185 and enable control terminal 190.Control circuit enable switch 180
Passage is coupled to the comparison output end 113 of comparator 110 and except between energy voltage 185, control circuit enable switch 180 includes
One component control terminal, it is coupled to enable control terminal 190.
Fig. 6 is the power management process figure of the motherboard of second embodiment of the invention.Coordinate the motherboard 200 shown in Fig. 5
Block diagram describe its power control circuit 195 operation it is as follows, wherein step 650,660,670,680 correspond in Fig. 2, the
The step 250 of one embodiment, 260,270,280, and both are roughly the same, will not be repeated here.
In the second embodiment of the present invention, as shown in step 652, judge motherboard whether send except can control signal in
Enable control terminal, if so, as shown in step 654, the channel conductive of control circuit enable switch, and enable control terminal is via control
Circuit enable switch is coupled to except energy voltage, power termination is normally closed；If it is not, that is, enable control terminal receive main frame
The passage cut-off of an enable that plate is sent control signal, then control circuit enable switch, and continue dynamic after step 660
Make flow, i.e. the unlatching of power termination and closing is determined by the voltage of comparator output, its refer in first embodiment and
Explanation related Fig. 2.Wherein, described enable controls signal and except that can control signal, can utilize the bouncing pilotage on motherboard
（jump）Circuit, microprocessor or microcontroller, carry out the setting of hardware mode or software mode
As shown in figure 5, in the second embodiment of the present invention, control circuit enable switch 180 and enable control terminal 190
Configuration purpose be that motherboard 200 can actively judge whether the output of supply-voltage source 160 can be abnormal in load too low
Work, such as judged using the mode for distinguishing identification symbol.When motherboard 200 judges the output of supply-voltage source 160 simultaneously
Will not the irregular working in load too low, now motherboard 200 can send except signal can be controlled in enable control terminal 190, and
Power termination 130 is normally closed, to avoid unnecessary power consumption；Conversely, then sending enable control signal, make power termination
130 can be in time turned on and off, it is ensured that the normal work of supply-voltage source 160.In this way, not only make supply-voltage source
160 under various states can normal work, also obtain equalization point on the efficiency optimization of system power, make supply voltage
The load that source 160 is exported all belongs to autotelic output, rather than random waste.
Fig. 7 is the block schematic diagram of the motherboard 400 of third embodiment of the invention.Fig. 8 is third embodiment of the invention
The method for managing power supply flow chart of motherboard 400.Motherboard 400 disclosed by third embodiment of the invention is applied to a computer
Among system.Motherboard 400 includes control assembly 410 and power termination 130, and wherein control assembly 410 has start shape
State exports stitch 411, and power termination 130 includes control terminal 131 and power take-off 132, and control terminal 131 is coupled to control
Component 410 processed, and power take-off 132 is coupled to the power source supply end 160 of power supply unit.The control assembly of motherboard 400
Open state of 410 systems according to computer system, controls the open and close of power termination 130.
Hereby the block schematic diagram of the motherboard 400 shown in cooperation Fig. 7 illustrates the method for managing power supply of Fig. 8 motherboard 400,
Include following steps：As shown in step 810, the power for supply-voltage source 160 to motherboard 400 being provided with power supply unit is born
Carry 130.As shown in step 830, start computer system and perform boot-strap program code, and transmit control of the start signal to motherboard
Component 410 processed.As indicated at step 850, the open state output stitch 411 of control assembly 410 is according to start signal output first
Output voltage to open power termination 130, and has additional supply of the output loading of voltage source 160, wherein controlling to power termination 130
Component 410 processed can be microcontroller common on general motherboard（microcontroller）Or the behaviour such as South Bridge chip group
Make pieces, but be not limited thereto.Then, as shown in step 870, judge whether computer installation has completed boot program generation
Code, if so, then as shown in step 890, the open state output stitch 411 of control assembly 410 exports the second output voltage to work(
Rate load 130, to close power termination 130；If it is not, then return to the motion flow of step 850.
The effect of the present embodiment, is, computer system is prevented when booting up program code, for supply-voltage source
For 160, the too low situation of output loading is might have, and causes the irregular working of supply-voltage source 160 and even starts guarantor
The action that protection mechanism is closed automatically, cause computer system can not normal use.Therefore, stitch is exported using open state
411 open and close according to the open state control power termination 130 of computer system, and according to this to supply-voltage source 160
Extra output loading is provided, also even computer installation does not complete start, and power termination 130 provides an extra output loading
Supply-voltage source 160 is given, and when computer installation has been completed to start shooting, control assembly 410 closes power termination 130, so
Not only make supply-voltage source 160 under various states can normal work, also obtained on the efficiency optimization of system power
Equalization point, the load for being exported supply-voltage source 160 all belong to autotelic output, rather than invalid waste.
Fig. 9 be disclosed herein fourth embodiment motherboard 500 block schematic diagram.The present embodiment and the 3rd is in fact
The motherboard applied disclosed by example is roughly the same in structure, and difference between the two is, the motherboard disclosed by 3rd embodiment
Further comprise voltage quasi position change-over circuit 510, it has input 511 and output end 512, and input 511 is coupled to control
The open state output stitch 411 of component processed, output end 512 are connected to the control terminal 131 of power termination 130.Voltage quasi position turns
The system of circuit 510 is changed open state to be exported to the predetermined voltage standard that the logic voltage level of stitch 411 is converted to control terminal 131
Position, for example, voltage of supply-voltage source 160.For example, open state output stitch 411 system is with the universal of microcontroller
Input and output（General purpose input output, GPIO）Stitch realizes that its logic voltage level may be 3.3 volts
Spy, and the switch module system in power termination 130 is with a N-type metal oxide semiconductor field effect transistor（N-MOSFET）Come real
It is existing, and its pressure-resistant demand for meeting supply-voltage source 160.Because 3.3 volts of voltages possibly can not effectively make power termination
130 switch module conducting, and the output loading for causing power termination 130 to be formed reduces, and influences caused by of the invention be intended to
Effect, therefore 3.3 volts of level is converted to using voltage quasi position change-over circuit 510 voltage of supply-voltage source 160,
Such as positive 12 volts of predetermined voltage level, to which effectively switch module is turned on, with play the present invention work(caused by desire
Effect.
Figure 10 be disclosed herein fourth embodiment motherboard 500 method for managing power supply flow chart.Hereby coordinate
The block diagram of motherboard 500 disclosed by Fig. 9 illustrates that Figure 10 method for managing power supply is as follows.Wherein, step 1010,1030 can join
Examine the step 810 of 3rd embodiment in Fig. 8,830 related description.Then, as shown in step 1050, control assembly 410 is opened
Machine state output stitch 411 exports the first output voltage according to start signal, and is converted to via voltage quasi position change-over circuit 510
Predetermined voltage level to open power termination 130, and has additional supply of the output loading of voltage source 160 to power termination 130.So
Afterwards, as shown in step 1070, judge whether computer installation has completed boot-strap program code, if so, then as shown in step 1090,
The open state output stitch 411 of control assembly 410 exports the second output voltage, and via 510 turns of voltage quasi position change-over circuit
After being changed to predetermined voltage level, power termination 130 is sent to, to close power termination 130；If it is not, then return to step 1050
Motion flow.
As shown in figure 11, in the motherboard 500 disclosed by fourth embodiment of the invention, voltage quasi position change-over circuit 510
It may include there is level transfer resistance 610 and level change-over switch 620, and level transfer resistance 610 and level change-over switch 620
Tandem connect, and be coupled between supply-voltage source 160 and earth terminal 230.The control of level change-over switch 620
End is then the input 511 of voltage quasi position change-over circuit 510.For example, the system of level change-over switch 620 is with a N-type metal
Semiconductcor field effect transistor is aoxidized to realize, when input 511 is 3.3 volts, also the positive of as 3.3 volts logic levels is interrogated
When number 1, level change-over switch 620 turns on, and output end 512 is the voltage of earth terminal 230, also as 0 volt；And work as input
511 be 0 volt, and also during the anti-phase signal 0 of as 3.3 volts logic levels, level change-over switch 620 ends, and output end 512 is
The voltage of supply-voltage source 160, it is for example, positive 12 volts.
It is worth noting that, for the angle of logic circuit, voltage quasi position change-over circuit 510 realizes a phase inverter
Function, precisely because input 511 is different from the logic voltage level of output end 512, therefore with the third embodiment of the present invention and the
Four embodiments compare, and are intended to be controlled identical power termination 130, and its is defeated for the open states of two embodiments output stitch 411
The logic gone out must be anti-phase each other.If however, add a phase inverter in the voltage quasi position change-over circuit 510 of fourth embodiment,
Then the output logic of the open state output stitch 411 of two embodiments can be with phase signal.Therefore, each implementation provided above
Example, only as the present invention's for example, not to limit embodiment aspect of the invention, one skilled in the art,
All design for change can be carried out for each component part of control circuit according to the actual demand in circuit design, without departing from
Disclosed herein spirit.
The effect of of the invention, is, by the control circuit and its control method on motherboard, in the defeated of supply-voltage source
Go out load may it is too low when, there is provided its extra output loading, and in the case where not needing the behaviour in service of extra output loading will
Its close, therefore make power supply unit under various states can normal work, and make disclosed herein motherboard all
Different electrical power supply can be applied to, while and can takes into account the efficiency optimization of system power.
Although embodiments of the invention are disclosed above described, the present invention is so not limited to, it is any to be familiar with related art techniques
Person, without departing from the spirit and scope of the present invention, such as according to the shape described in the present patent application scope, construction, feature and number
Amount, which is worked as, can do a little change, therefore the scope of patent protection of the present invention must be defined depending on this specification appended claims
Person is defined.
Claims (16)
1. a kind of motherboard, applied to the power supply unit of different loads driving force, the power supply unit provides a supply
Voltage source gives the motherboard, it is characterised in that the motherboard includes：
One power control circuit, includes：
One comparator, have one first compare input, one second compare input and one compare output end；
One generating circuit from reference voltage, it is coupled to described second and compares input, and exports a reference voltage；
One power termination, there is a control terminal and a power take-off, wherein the power take-off is coupled to the supply
Voltage source, the control terminal are coupled to the relatively output end；
One interface voltage；And
One current potential determines resistance, is coupled to the interface voltage；And
One expansion card slot, electrically plugged for an expansion board, the expansion card slot has a status pin, and the state pin
Pin is coupled to the current potential and determines resistance input compared with the first of the comparator；
Wherein, the status pin is normally coupled in the interface voltage, and the voltage of the status pin connects between described
Between mouth voltage and the reference voltage, and the reference voltage is different from, the output electricity of comparator output one first
The power termination is depressed into, to open the power termination, and increases the output loading of the supply-voltage source；And when described
Expansion board is inserted in the expansion card slot, and the expansion board sets the voltage of the status pin not between the interface voltage
And between the reference voltage, the comparator exports one second output voltage to the power termination, to close the work(
Rate loads.
2. motherboard as claimed in claim 1, it is characterised in that the interface voltage is more than the reference voltage, makes in the lump
The voltage for obtaining the status pin is more than the reference voltage, and the comparator exports first output voltage to the power
Load, and when the expansion board is inserted in the expansion card slot, the voltage of the status pin is less than the reference voltage,
The comparator exports second output voltage to the power termination.
3. motherboard as claimed in claim 1, it is characterised in that the interface voltage is less than the reference voltage, makes in the lump
When the voltage of the status pin is less than the reference voltage, the comparator exports first output voltage to the power
Load, and when the expansion board is inserted in the expansion card slot, the voltage of the status pin is more than the reference voltage,
The comparator exports second output voltage to the power termination.
4. motherboard as claimed in claim 1, it is characterised in that the generating circuit from reference voltage includes one first reference
Resistance and one second reference resistance, first reference resistance are coupled between the interface voltage and the reference voltage,
Second reference resistance is coupled between the reference voltage and an earth terminal.
5. motherboard as claimed in claim 1, it is characterised in that the voltage of the status pin is normally equal to the interface
Voltage, and when the expansion board is inserted in the expansion card slot, the voltage of the status pin is equal to the motherboard
The voltage of earth terminal.
6. motherboard as claimed in claim 1, it is characterised in that the power termination also includes a power resistor and one opened
Component is closed, the power resistor is coupled between a passage of the supply-voltage source and the switch module, the passage coupling
Between the power resistor and an earth terminal, when the comparator exports first output voltage to the power termination
The passage is turned on, to open the power termination, and when the comparator exports second output voltage to the work(
Rate load ends the passage, and the power termination is closed.
7. motherboard as claimed in claim 1, it is characterised in that also include control circuit enable switch, one except energy electricity
Pressure and an enable control terminal, control circuit enable switch are coupled to the comparison output end of the comparator, described remove energy
Between voltage and the enable control terminal, and the control terminal is removed via control circuit enable switch coupled to described
Energy voltage, the power termination are normally closed, and when the enable control terminal ends the control circuit enable switch
Passage, the voltage that the unlatching and closing of the power termination are exported by the comparator determine.
8. a kind of motherboard, applied in a computer system, and suitable for the power supply unit of different loads driving force,
The power supply unit provides a supply-voltage source and gives the motherboard, it is characterised in that the motherboard includes：
One control assembly, there is open state output stitch；And
One power termination, has a control terminal and a power take-off, and the power take-off is coupled to the supply voltage
Source, the control terminal are coupled to the open state output stitch；
Wherein, when the computer system performs a boot-strap program code and transmits a start signal to the control assembly, institute
The open state output stitch for stating control assembly exports one first output voltage to the power termination according to the start signal,
To open the power termination, and increase the output loading of the supply-voltage source, and when the computer system completes institute
Boot-strap program code is stated, open state output stitch output one second output voltage to the power of the control assembly is born
Carry, to close the power termination.
9. motherboard as claimed in claim 8, it is characterised in that the control assembly is a microcontroller chip or a south bridge
Chipset.
10. motherboard as claimed in claim 8, it is characterised in that the power termination also includes a power resistor and one
Switch module, the power resistor is coupled between one end of the supply-voltage source and the switch module passage, described to open
The passage for closing component is coupled between the power resistor and an earth terminal, and the component control terminal of the switch module is coupled to
The control terminal, when open state output stitch exports first output voltage to the power termination, the switch
The channel conductive of component, to open the power termination, and when open state output stitch output second output
Voltage to the power termination, the passage of the switch module ends, and the power termination is closed.
11. motherboard as claimed in claim 8, it is characterised in that also include a voltage quasi position change-over circuit, include one
Input and an output end；The input is connected to the open state output stitch of the control assembly, and the output end connects
The control terminal of the power termination is connected to, the control is converted to the open state to be exported to the logic voltage level of stitch
The predetermined voltage level at end processed.
12. motherboard as claimed in claim 11, it is characterised in that the voltage quasi position change-over circuit also includes a level
Transfer resistance and surely position conversion switch, the level transfer resistance are coupled to the supply-voltage source and the voltage quasi position
Between the output end of change-over circuit, the passage of the level change-over switch is coupled to the output end of the voltage quasi position change-over circuit
Between an earth terminal, the component control terminal of the level change-over switch is then coupled to the input of the voltage quasi position change-over circuit
End.
13. a kind of method for managing power supply of motherboard, it is characterised in that include following steps：
A power termination of the supply-voltage source to the motherboard is provided with a power supply unit；
One generating circuit from reference voltage of the motherboard exports a reference voltage；And
Whether the expansion card slot for judging the motherboard with a comparator of the motherboard plugs an expansion board；
If it is not, the voltage of a status pin of the expansion card slot is between interface voltage and the reference voltage, and
And the reference voltage is different from, the comparator exports one first output voltage to the power termination, to open the work(
Rate loads, and increases the output loading of the supply-voltage source,
If so, the expansion board set the voltage of the status pin not between the interface voltage and the reference voltage it
Between, the comparator exports one second output voltage to the power termination, to close the power termination.
14. the method for managing power supply of motherboard as claimed in claim 13, it is characterised in that also include following steps：
If one of channel conductive, the power termination control terminal of one of described motherboard control circuit enable switch is coupled to
One, except energy voltage, closes to the power termination normality；And
If the passage cut-off of the control circuit enable switch of the motherboard, the control terminal voltage of the power termination by
The voltage of comparator output determines, to set being turned on and off for the power termination.
A kind of 15. method for managing power supply of motherboard, applied to a computer system, it is characterised in that the power management side
Method includes following steps：
A power termination of the supply-voltage source to the motherboard is provided with a power supply unit；
Start the computer system and perform a boot-strap program code, and transmit a control of the start signal to the motherboard
Component；
The open state output stitch of the control assembly exports one first output voltage to described according to the start signal
Power termination, to open the power termination, and increase the output loading of the supply-voltage source；And
When the computer system completes the boot-strap program code, the open state output stitch output one of the control assembly
Second output voltage is to the power termination, to close the power termination.
16. method for managing power supply as claimed in claim 15, it is characterised in that first output voltage and described second
Output voltage is converted to a predetermined voltage level via a voltage quasi position change-over circuit, then exports to the power termination.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101150667 | 2012-12-27 | ||
| TW101150667A TWI459189B (en) | 2012-12-27 | 2012-12-27 | Motherboard and power management method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN103901959A CN103901959A (en) | 2014-07-02 |
| CN103901959B true CN103901959B (en) | 2018-03-20 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310072532.1A Active CN103901959B (en) | 2012-12-27 | 2013-03-07 | Mainboard and power management method thereof |
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| CN (1) | CN103901959B (en) |
| TW (1) | TWI459189B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9977480B2 (en) * | 2015-04-15 | 2018-05-22 | Qualcomm Incorporated | Selective coupling of power rails to a memory domain(s) in a processor-based system |
| US10684671B2 (en) | 2016-05-27 | 2020-06-16 | Qualcomm Incorporated | Adaptively controlling drive strength of multiplexed power from supply power rails in a power multiplexing system to a powered circuit |
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| US7000127B2 (en) * | 2002-04-30 | 2006-02-14 | Dell Products L.P. | Power saving circuit for display system |
| CN101419494A (en) * | 2007-10-26 | 2009-04-29 | 华硕电脑股份有限公司 | Computer system for resolving collocation problem of power supplier |
| CN202150025U (en) * | 2011-03-23 | 2012-02-22 | 深圳市晶福源电子技术有限公司 | Intelligent dummy load automatic switching control system |
| CN202190212U (en) * | 2011-09-09 | 2012-04-11 | 青岛海信电器股份有限公司 | Overvoltage control circuit, low-power-consumption power circuit and television |
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| US8450980B2 (en) * | 2004-06-29 | 2013-05-28 | Intel Corporation | Providing resilient power to a system |
| TWI318734B (en) * | 2005-10-21 | 2009-12-21 | Hon Hai Prec Ind Co Ltd | Power voltage detecting circuit |
| CN101414210B (en) * | 2007-10-19 | 2011-11-30 | 鸿富锦精密工业（深圳）有限公司 | Power supply adapter circuit |
| TWM428406U (en) * | 2011-12-08 | 2012-05-01 | Richtek Technology Corp | Power management control circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7000127B2 (en) * | 2002-04-30 | 2006-02-14 | Dell Products L.P. | Power saving circuit for display system |
| CN101419494A (en) * | 2007-10-26 | 2009-04-29 | 华硕电脑股份有限公司 | Computer system for resolving collocation problem of power supplier |
| CN202150025U (en) * | 2011-03-23 | 2012-02-22 | 深圳市晶福源电子技术有限公司 | Intelligent dummy load automatic switching control system |
| CN202190212U (en) * | 2011-09-09 | 2012-04-11 | 青岛海信电器股份有限公司 | Overvoltage control circuit, low-power-consumption power circuit and television |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103901959A (en) | 2014-07-02 |
| TW201426273A (en) | 2014-07-01 |
| TWI459189B (en) | 2014-11-01 |
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